OMG - Mushrooms are a nightmare in my tank - worse mistake I ever made. Anyone local to Northern VA is welcome to come buy and get all you want (free). Got metalic blue/green and some solid blues.
I too have had great luck with ZOAs spreading. My only regret is that I intially bought "commong/cheap" ZOAs like Green Eagle-eyes, Black Cherry Zoas, some no name brown & cinnamon palys, etc.... They are quickly tanking up real estate that I would like to use to place some higher end stuff there. Hardy little buggers for sure.
Just bought a frag tank to house the high end stuff and will one day completely redo my maintank to rid it of some of it's current inhabitants.